EVENT 701 Boys Open 100m Butterfly - Heats
Not Competing : 42,54
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | James Speers | 10 | Thurrock | 1:26.28 |
| 3 | 3 | Samuel Perks | 10 | Chelmsford | 1:19.93 |
| 4 | 5 | Evan Thomas-Mansfield | 11 | Co Cambridge | 1:17.01 |
| 5 | 4 | Mason Hunnisett | 10 | Basildon Ph | 1:21.86 |
| 6 | 2 | Callum Bazela | 10 | Thurrock | 1:29.64 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 7 | Nathan Swift | 11 | Team Luton | 1:19.77 |
| 2 | 9 | Benjamin Garton | 12 | Co Peterboro | 1:18.00 |
| 3 | 11 | Harry Whiteman | 12 | Co Peterboro | 1:13.81 |
| 4 | 13 | Jack Lane | 11 | Wisbech | DQ:T . |
| 5 | 12 | Sebastian Di Siena | 12 | Co Peterboro | 1:13.28 |
| 6 | 10 | James McFarland | 12 | Mid Beds | 1:18.31 |
| 7 | 8 | Harvey Norman | 11 | Co Peterboro | 1:19.18 |
| 8 | 6 | Charles Whyte | 11 | West Suffolk | 1:22.67 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 15 | Harry Nicholls | 12 | Basildon Ph | 1:13.73 |
| 2 | 17 | Myles Turner | 12 | West Suffolk | 1:20.68 |
| 3 | 19 | Nicholas Perkins | 12 | UEA Norwich | 1:12.08 |
| 4 | 21 | Jake Thomas-Mansfield | 13 | Co Cambridge | 1:11.21 |
| 5 | 20 | Samuel Peck | 12 | Little Fish | 1:13.25 |
| 6 | 18 | Mason Brand | 11 | Berkhamsted | 1:17.48 |
| 7 | 16 | Charlie Hutchison | 11 | Colchester | 1:16.17 |
| 8 | 14 | Cameron Alston | 12 | Bo Southend | 1:12.21 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 23 | Ryan Smith | 13 | UEA Norwich | 1:09.95 |
| 2 | 25 | Charlie Boden | 12 | Chelmsford | 1:11.59 |
| 3 | 27 | Jamie Scholes | 13 | Co Peterboro | 1:10.27 |
| 4 | 29 | Maxwell Duffy | 13 | Chelmsford | 1:08.62 |
| 5 | 28 | Louis Spong | 13 | DunmowAtlant | 1:09.94 |
| 6 | 26 | Ben Harrison | 12 | Potters Bar | 1:09.51 |
| 7 | 24 | Andrew Martindale | 13 | Thurrock | 1:08.21 |
| 8 | 22 | Benjamin Garratt | 13 | Hemel Hemp | 1:08.62 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 31 | Oliver Newton | 13 | Wisbech | 1:07.41 |
| 2 | 33 | Solomon Giesler | 14 | Co Cambridge | 1:07.13 |
| 3 | 35 | Giovanni Di Siena | 14 | Co Peterboro | 1:09.34 |
| 4 | 37 | George Bennett | 14 | UEA Norwich | 1:07.41 |
| 5 | 36 | Patrick Keaveney | 13 | Modernians | 1:09.66 |
| 6 | 34 | Max McCusker | 13 | Hoddesdon | 1:05.53 |
| 7 | 32 | Samuel Pedder | 14 | Co Cambridge | 1:09.53 |
| 8 | 30 | Nathan Hughes | 12 | Hatfield | 1:08.78 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 39 | Cameron James Simpson | 14 | Colchester | 1:10.35 |
| 2 | 41 | Nicholas Lambarth | 14 | St Felix Sch | 1:07.07 |
| 3 | 44 | Harry Wagner | 14 | Mildenhall | 1:06.93 |
| 4 | 46 | Jack Andrew | 14 | teamipswich | 1:05.72 |
| 5 | 45 | George Clarke | 14 | UEA Norwich | 1:06.36 |
| 6 | 43 | Thomas Harrington | 14 | Co Cambridge | 1:05.32 |
| 7 | 40 | Liam Murphy | 14 | Dereham | 1:06.64 |
| 8 | 38 | Lee Clarke | 14 | Co Peterboro | 1:06.41 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 48 | Daniel Leigh | 14 | Co Peterboro | 1:07.31 |
| 2 | 50 | Laurence Chalk | 14 | Sudbury | 1:04.39 |
| 3 | 52 | Oliver Perry | 14 | Co St Albans | 1:03.68 |
| 4 | 55 | Harry Parker | 14 | Hatfield | 1:02.48 |
| 5 | 53 | Hugo Johnson | 14 | Bo Southend | 1:03.02 |
| 6 | 51 | Dominic Scifo | 13 | teamipswich | 1:02.95 |
| 7 | 49 | Daniel Orcutt | 14 | West Suffolk | 1:04.55 |
| 8 | 47 | Bradley Veitch | 14 | Harlow Pen | 1:07.64 |